E09 High
Your boiler has detected an internal communication problem between its electronic brain and the gas supply system, meaning it cannot safely light the flame.
Technical description: Valve drive error – possible gas valve or control box fault
Typical repair cost: £220-450 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like E09 — no call-out fees, no surprises.
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Parts commonly replaced
- Gas Valve
- Printed Circuit Board (PCB)
- Wiring Harness
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